Oborny, Stephan, Anthony Layzell, Greg Ludvigson, and Franek Hasiuk. “Revision to Nomenclature of the Zarah Subgroup of the Kansas City Group (Pennsylvanian) in Kansas”. Midcontinent Geoscience 3 (December 13, 2022): 27–34. Accessed May 5, 2025. https://journals.ku.edu/mg/article/view/18249.